[amsat-bb] Power output for using AO-73 transponder

Paul Stoetzer n8hm at arrl.net
Sun Dec 8 12:13:24 PST 2013

FYI - In a sidebar on their website, AMSAT-UK requests that stations limit
power output to 25W EIRP for using the AO-73's transponder.

"FUNcube-1 / AO-73
Radio Communications Subsystem
• 145.935 MHz BPSK Telemetry 30 or 300 mW
• Inverting SSB/CW transponder 300 mW PEP
- 435.150 – 435.130 MHz Uplink LSB
- 145.950 – 145.970 MHz Downlink USB
Educational Telemetry beacon is 300 mW during day and 30 mW at night.
Transponder is only active during night passes.
Please use a maximium uplink power of 5 watts to a 7 dBi gain antenna (25 w
EIRP). Lower power will also work well.
If adjusting for Doppler shift manually try tuning the uplink frequency
while transmitting to keep the downlink constant."



Paul Stoetzer, N8HM
Washington, DC

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